mohrdieck



P. MOHRDIECK. INTERNAL COMBUSTION ENGINE. APPLICAUON FILED'JULY 25.1911.

Patentd June 10, 1919.

2 bHEETS-SHEET l UNITED sTATEs PATENT OFFICE.

PETER MOHRDIECK, OF OAKLAND, CALIFORNIA, ASSIGNOR '1-0 'lHE` STANDARD rAS ENGINE COMPANY, F OAKLAND, CALIFORNIA, .A` CORPORATION 0F CALIFORNIA.

rNTEnNAL-cMBUsTIoN ENGINE.'

escenas.

i malato/tom 'it may concern:

l. Be .,it`kuown that I, PETER MOHRDIEGK, a

citizen of the United States, residing at Oakland, in the county of Alameda andState of California, have invented certain new and useful Improvements in Internal- Combustion Engines, of which the following is a specication.- j

This invention relates to improvements 1n internal combustion engines and more particularly to means'- associated therewi th '.wherebyfuel having a higher point of va porization than commercial gasolene may be eiliciently used in the engine.

One of the objects of the present invention .is to provide the cylinders with an air jacket .in which a preliminary heatlng of the al1' to' the carbureter takes place, the passage of air therethrough serving also to assist in :cooling the cyhnders.

Another object -of the invention -is to p ro- Kvide auxiliary exhaustports through which 'a' portion of the burnt gases'are discharged "thereby relievingthe regular exhaust valves and more quickly reducing the pressure in y the cylinders. A still further object of the invention 1s to provide a type of heater inwhich the air to the carbureteris caused to take up a certain amount of heat before passing lthe spray nozzle, and after passing through 'the latter, an' additional amount of heat is communicated thereto. And finally I provide means for drawing off any vapor,

combustible or otherwise, which accumulates within the crank case.

With these and other objects in view, the

invention consists of certain novel features of construction, combinations and arrangements 'of parts hereinafter described and more specilically pointed out in the appended claims; it being understood that changes in l, form, proportion, size and minor details of f construction within/the scope of the claims maybe resorted to without departing from the spirit of the invention or sacrificing any.

in rear elevation' of the y specification of Letters Patent. Patented June 1'0, 1919 Applicatien'led July 25, 1917. Serial No. 182,768'. I

l Referring to corresponding parts of theI several vlews by the same 'numerals of ref-` erence, 1 and 2 denote engine cylinders each havingl an exhaust valve 3, an intake Valve of similar construction which'is not shown, and the usualwater jacket 4. The piston is designated by 5 and is here shown at the lowest point of its travel while G denotes the upper portion of the crank case to which the cylinder is attached 'in any preferred 1nanner.

The water jacket 4 extends to a point below the lowermost point of piston travel and below the water jacket is an air jacket 7. This jacket is provided on one sideof the cylinder with air holes 8 While on the opposite yside is an exit poi-lj 9, and I have also` provided, at the lower portionl of the air jacket, an opening I0 wl1ich`communicates with the interior of the crank case G. .Above the port 9 are ports 12 extending from the Yinterior of the cylinders l and nf2 through the water jacket to the outside thereof, these ports being so positioned that they are just uncovered by the upper end of the pistons when/in their lowermost positions.

Attached t0 the walls of the engine jacket n vis valye casing denoted generally by 14, thiscasing being of sufficient width and depth to cover the exhaust ports 12 and the air port 9, In this casing is an upper cha1n. ber 15 and a lower chamber 16, the former' communicating with the exhaust ports and the latter with the air ports.v V

lPivotally mounted in the side walls of the casing 14 and in suitable lugs 17, are rods 1,81to' which is attached a swinging check valve 19. -These rods are continued through the casing and have'attached on the outsideuthereof arms 50 to the outer 'end 'of whichis attached coil springs 51.*

' thereto.

Extending .outwardly from the body of lThis arrangement of the springs also prevents them losing their temper due to eX- cessive heat which would be the case if they are placed within thecasing or positioned closely to the sides thereof.

Centrally disposed openings 23and 24 are provided in the front Wall of casing 14 from 'chambers 15 and 16, respectively, 4and on each side of Aopening 23 are other openings 21 into chamber 15, these openings being .closed by removable plates 22 which thereby permit inspection and adjustment of the valves 19.

Attached to the front wall of the casing 14 is the improved heater denoted generally which consists of the substan-k 25, and tiall'y rectangular body portion 26 having at the upper end a neck 27 at right angles The latter is flanged for attachment to the pasing 14 and has passages 31 and 32 which aline with openings 23 and 24. The body 26 is divided by the Wall 28 into two almost equal chambers denoted by 29 and 30.V The upper end of chamber 29 communicates'tlirough passageway 31 with thechamber 15 in the valve casing 14, while the upper portionofchamber 30 communicates through the passageway 32 with the` chamber 16.v It will he noted thatpassage way 32 is curved to the outside of the neck 27 and then upwardly as shown at 33 to enable it to enter at the top of the chamber 30.

Within the chamber 2S) is a tubular member 34 having its upper and lower ends formed in the upper and lower walls of the heater. This member forms a straight passageway 35 which, on its upper endis 'in communication with the interior of Vthe intake manifold 3G while on its lower end is in communication with the outlet opening ofthe carburetor 40. l

Extending centrally across chamber 30 from the division wall 28 to the opposite wall of `the chamber is an irregularly shaped portion 41 which ishollow2 the opening 43 therethrough communicating on the one end with the chamber 29 and on the other end with the opening 42 to which is, attached the flange end of the exhaust pipe? Lacasse of except Where it is joined to the division vwall 23 and to the wallA adjacent the opening 42.

The bottom of the casing 26 is provided with an opening 44 Which communicates with the carburetor intake 45, and the vfront the bottom thereof I provide openings 55 and a valve plate 56 for more or less clos ing the same. In this manner outside cool air may be, if desirable, mixed with' the heatled air before it enters the carburetor. An .adjustment of `the amount of air drawn through the carburetor is secured by some form of valve such as the usual butterliy valveillustrated at 57. y

In use, when the intake valve is open and the piston is on its down stroke, a suction is created in the intake manifold This draws air through the lopenings 8 which circulates around the cylinder Walls and thus receives `a preliminary heating, and at the same time, assists in cooling the cylinder. This air passes from the air jacket 7 through the chamber 16`in the valve. casing. through passageways 32 and 33 then down through chamber 30 on the two sides et' the portion 41 into the carbureter in 'a ke 45 and past the spray nozzle 60. During this time, the ai-r which was first heated by the walls of the cylinder receives an extra increment or heat when it passes over the heated surfaces, especially that of the portion 41; l Aiter passing the spray nozzle 60 the fuel ladened air is drawn through the passage 35,

the wall of which is'in contact with the hot e'o Y,

incoming as where it is further heated so y valve. This port is uncovered. by the-piston.

at the end oil the expansion stroke and the residual pressure in the cylinder 1s suliicient vto open the swingingcheck-lf) whereby a portion ofthe hot burnt gases are discharged.

through port 12, the chamber 15 and passageway 21. These gases then pass downwaidly around the tubular division wall 34 andfrom there through the flat passageway 43 in the portion 41 and finally out through opening 42 into the exhaust pipe 43.

It will thus be noted that the incoming hot gases first con'nnunicate their heat to the wall 34 through which the vaporized fuel is v`.passing after leaving the carbureter so that a high degree of heat may be imparted to these gases Without unduly rheating the parts ofthe carburetor.

passes through this device is also drawn A portion of air which action,

through the openingA 10 from the crank case the amount thereof depending on the tightness of the latter.

The use of the check valves 19 will now be readily apparent as when the' piston reaches the lowest point of the suction stroke, a vacuum still remains in the cylinder and if it Awere not for these valves, a portion of the unburnt gases previously discharged into the heater would'be drawn back into the cylinder. These valves prevent such the suction plus the tension of the springs 51 efectivelyholding them closed,and yet the force exerted by thesprings may be made so light that it requires very little pressure to open the valves durin the exhaust period. On the` other hand i less heat is desired in the air passing through the heater, then the tension of the -springs may be increased resulting in a smaller opening ofthe valves and a decreased flow of hot gas.

Vhile I have shown the preferred vembodiment of my invention in which the heater is,

attached to an auxiliary exhaust port, it will be readily apparent that by slight modification the heater might be attached direct to the ordinary exhaust manifold and that air could be drawn'directly from the atmosphere instead of first through an air jacket.

Having thus described my invention, l claim as new and wish to cover by Letters Patent l. The combination with an internal combustion engine cylinder having an air jacket, of a fuel heater having an air passageway and a burnt gas passageway with common division walls, the ingress end of said gas passageway communicating with an exhaust port in said cylinder, means for regulating the amount of gas fiowing through said gas passageway, and the ingress end of said air passageway communicating with said air jacket, an auxiliary air intake for admitting air to said air passageway intermediate its ends, and a carbiireter interposed in said air passageway intermediate the ends thereof.

2. The combination with an internal combiistionengine cylinder having an exhaust port adapted to be uncovered by the piston near the end of its out stroke, a fuel heater havingtwo 'adjacent non-comiiiunicating chambers, a cylii1drical.tubular member haviiigin air passageway ,extending longitudinally through the rst of said chambers, a flat, tubular member extending transversely across the second of said chambers and hav' ing a. gas passageway communicating with said first chamber and the atmosphere, a carburetor having the end of its passagewaly connected to one end of said cylindrical tu;`

biilar member and one end of said secondi` chamber, and a laterally extending neck on said body having two passageways ene/'of which communicates with said exhaust port and said first mentioned chamber and the other of which con'm'iunicates with the atl mosphere and said second chamber.

3. An explosive engine, the combination with an engine cylinder having an exhaust port, an intake opening and a carbiireter, a

heater comprising a body portion having integral walls forming two chambers, an in- ,tegrally formed tubular member extending longitudinally through one of said chambers and communicating at one end with said intake opening and at the other end with the egress end of said carbureter, said chamber communicating with said exhaust port, an integrally formed flat, tubular sleeve extending transversely through the second of said chambers and having a passageway communicating with said first mening an airl passageway extending `longitudinally through the first of said chambers, a flat, tubular member extending transversely across the second of said chambers and having a gas passageway communicating with said first chamber and the atmosphere, 4a carbureter having the end of its passageway connected to one end of said cylindrical tubular member and one end of said second. chamber', a laterally extending neck on said body having two passageways one of which communicates with said exhaust port and said first mentioned chamber and the other of which communicates with the atmosphere and said second chamber, a check valve in said passageway communicating with said exhaust port, and spring means for adjusting the amount of opening of said valve.

5. A device of the character' described comprising the combination with a gas engine cylinder having an exhaust port, valve casing attached to said cylinder and having a chamber lcommunicating with said port,

a heater attached to said casing having two' adjacent' non-communicating passageways, one for air and one for gas, the ingress 'end of said gasfpassageway communicating with chambers, a cylindrical tubular member having an air passageway extending longitudinali f through the first of said chambers a n i fiat, tubular member extending transversely across the second et' said chambers and having a gas passageway communicating with said first chamber and the atmosphere, a, carbnreter having the end of its passageway connected to one end of said cylindrical tubular member and one end of said second chamber, said rst mentioned chamber having an air intake opening extending through. its walls, an adjustable valve for regulating the flow of air through said opening, a laterally extending neck on said body having two passageway/*s one of which communicates with said exhaust port and said lirst mentioned chamber and the other of which communicates with the atmosphere and said second chamber, a check valve in said passageway conmamic-ating` with said exhaust port, and springs means for adj Listing the amount of opening of said valve.

7. An air heater comprising a hollow body substantially parallelepiped in shape., a division wall extendinglongitudinally through said body and forming two substantially equal non-connnunicating chambers, an integrally formed tubular mel'nber havingy an air passageway extendingl longitudinally through one of said chambers, an integrally formed 'liat tubular member extending from said division wall transversely across the second of said chambers and having a. passageway communicating with said iirst chamber, and a laterally ext-ending neck adjacent one end of said body having passageways communicating with the cor 'esponding ends of said chambers.

S. lira heater of the class described comprising in combination with a gas engine cylinder havingr an exhaust. port and an aii` jacket, a body portion having circuitousI exhaust gas and air passageways separated by heat transm'itting division walls and having ingress and egress openings thereto, a

valve casing interposed between said heater` and said cylinder and having a chamber in communication. with said exhaust port and the ingress opening of said gas passageway, and having an air chamber communieating with said air jacket and the ingress opening ot said air passageway, and a spring operated valve in said. gas chamber for closing said exhaust port,

S). ln a heater of the class described coinprising in combination with a engine cylinder having an exhaust port and an air jacket, a body portion having circuitous exhaust. gas and air passageways separated by heat transmitting division walls and having ingress and egress openings thereto, a valve casing interposed between said heater and said cylindeiI and having a gas chamber in communication with said exhaust port and the ingress opening of said gas passageway, and having an air chamber coimnunicating with said air jacket and the ingress opening ot said air passageway,y a valve in said gas chamber tor closing said exhaust port, a spring; for holding` said valve closed and mea-ns for adjusting said spring so as to regulate the amount of exhaust past said valve.

lO. ln a device of the chart-eter described comprising the con'ibination with a gas engine cylinder, having a mechanically operated exhaust valve5 a piston and an exhaust port adapted to be uncovered by said piston v near the end of its out stroke of a heater having two adjacent non-communicating j iassagcways, one for air and one for .hot gas, attached to said cylinder, the ingress end oi3 said passageway terminating in an enlarged chamber, ar` valve pivotally mounted in said chamber for closing said exhaust port and adjustable means for regulating the pressure of said valve against its seat.

ln testimony whe-reelE l atlix my signature.

PETER lflOlllBlEQl- 

